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Problem 15-8: Engineering Mechanics- Dynamics (Hibbeler 14th Edition)

Engineering Mechanics Dynamics · R.C. Hibbeler · Chapter 15

Course: Engineering Mechanics Dynamics Book: R.C. Hibbeler Chapter: Chapter 15

Question

An automobile has a weight of 2700 lb and is traveling forward at 4 ft/s when it crashes into a wall. The impact occurs in 0.06 s. (a) Determine the average impulsive force acting on the car when the brakes are NOT applied. (b) If the coefficient of kinetic friction between the wheels and the pavement is $\mu_k = 0.3$, calculate the impulsive force on the wall if the brakes WERE applied during the crash (all four wheels slip). Assume the car comes to rest in both cases.

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